Papyrus X Undyne

When two worlds meet

*At Alphys' lab*
"AHHHHH, FRISK YOU CANT JUST BRING ANOTHER VERSION OF YOU TO OUR UNIVERSE!!" Alphys screamed.
"Alphys she was going to die!!!" Frisk said, "I couldn't just stand and watch."
"Ok, I'll give her a checkup to make sure she's ok," Alphys replied.
*Lazy author time skip to after checkup*
"You seem perfectly fine, you just haven't eaten a lot lately, have you?" Alphys asked.
"Not much..." Two replied. Alphys briskly walked out the room and came back a few minutes later with a cup of noodles.
"Here you go. I have to go call someone, so just stay here," Alphys said walking away. She grabbed her phone and dialed Sans' number.
"Sup Alphys," Sans said when he picked up the phone.
"Sans, you know those portals that keep popping up," Alphys said.
"Yeah, what about it?" Sans replied.
"They can come through the portal now," She answered.
"PFTTTTT!" Sans was, apparently, drinking ketchup at the time and spit it out, "WHAT!"
"Don't panic, we can fix this come to lab in a bit ok," She replied.
"Yep," He said as he hung up the phone.
-Meanwhile in Underfell-
*In Alphys' lab*
"Ok so if I can get this working, we should be able to create a breach," Alphys said.
"Will we be able to catch that little punk?" Undyne replied.
"Yes, plus the human from that dimension! So it's a win win," Alphys answered. She kept connecting the wires and constantly checking her computer as she worked. Suddenly the machine came to life, a low buzzing sound could be heard as it powered up.
"So far so good..." Alphys said, "Stand back, it could explode if I didn't do it right." Lights flashed as a large blue-ish purple portal started to appear. Slowly a picture faded into view, a small race track with four snails standing at the starting line.
"I-It worked!!!" Alphys practically screamed.
"Woah, slow down, we gotta call the others," Undyne said, she called Pap and Sans.
*when Papyrus and Sans got there*
"Ok let's go," Undyne said boldly walking through the portal. They entered Waterfall, they saw Napstablook feeding some snails.
"Ok let's see if Blooky knows where the human is," Papyrus said, marching over to the ghost. Pap and Blooky talked for a little bit.
"The human is in Hotland," Papyrus told the group.
-Back at the lab-
"Oh no, a portal opened in waterfall," Alphys said worryingly.
"How do you know that?" Two asked.
"I installed more cameras ever since the portals started opening," Alphys answered, "They already are on their way here."
"I'll call everyone," Frisk pulled out her phone and called Undyne, Sans, and Papyrus. The walked in a few seconds later, because Sans used a "shortcut".
"Alright so what's going on," Undyne said. Alphys started explaining, in detail, what was happening until...
"BANG, BANG, BANG!" Someone was pounding on the door.
"OPEN UP NOW!" A voice just like Undyne yelled. ((FellDyne from now on)) She pounded on the door some more. No one was sure what to do.
"We can't let them in here," Two said.
"Wait there's two of you Frisk??" Papyrus asked.
"Yeah, just call me Two," Two ansered, "Their ruthless murderers, I'm lucky to be alive."
"Ok, let's get ready for battle," Undyne said. Everyone stood ready to fight when the door burst open.
"Looks like the human from our world is here too, guess we'll have double the reward," FellAlphys said.
"Not if we have anything to say about it," Undyne said.
"Oh Yeah?" FellDyne replied. They were glaring at each other from across the room.
"NYEH HEHEHE!! You'll never beat us," Papyrus yelled. He was standing next to Undyne holding his bone spear. The battle officially started.
((imagine that but with the characters and their normal attacks))

No one could land a hit, it was like fighting a mirror. Alphys had a plan, when she gave the signal they had to  start fighting. The only problem was that, they had 20hp, they needed go in after their opponents were hurt.
Slowly everyone started getting tired. The Signal
A/N
AHHHHH I'M So SORRY!!!! I haven't posted in forever this took me a good hour and 15 minutes, or something. Anyways it's super early in the morning rn so yeah, I'll probably post the chapter later today
-Sam